From: Qu Wenruo <wqu@suse.com>
Date: Mon, 29 Apr 2019 06:03:32 +0000 (+0800)
Subject: btrfs: extent-tree: Add lockdep assert when updating space info
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=0185f364cb65855cdf5dfd0de11f8f9622940250;p=openwrt%2Fstaging%2Fblogic.git

btrfs: extent-tree: Add lockdep assert when updating space info

Just add a safe net for btrfs_space_info member updating.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index af73264e33a5..f37daddbeabe 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -58,6 +58,7 @@ enum {
 static inline void update_##name(struct btrfs_space_info *sinfo,	\
 				 s64 bytes)				\
 {									\
+	lockdep_assert_held(&sinfo->lock);				\
 	if (bytes < 0 && sinfo->name < -bytes) {			\
 		WARN_ON(1);						\
 		sinfo->name = 0;					\